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v3.21.1

Derivatives - Narrative (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2017 USD ($) derivative | Mar. 31, 2018 USD ($) | Dec. 31, 2020 USD ($) derivative | Dec. 31, 2019 USD ($)
Derivative [Line Items] |  |  |  |
Notional Amount | $ 100,000,000 |  |  |
Borrowings |  |  | $ 238,324,000 | $ 304,675,000
Stockholders' equity |  |  | 1,291,289,000 | 762,329,000
Cash collateral pledged on derivatives |  |  | 57,985,000 | 33,616,000
Net liability position |  |  | $ 0 | 0
Minimum |  |  |  |
Derivative [Line Items] |  |  |  |
Period to lock interest rate on mortgage loan commitments |  |  | 45 days |
Maximum |  |  |  |
Derivative [Line Items] |  |  |  |
Period to lock interest rate on mortgage loan commitments |  |  | 90 days |
Subordinated debt |  |  |  |
Derivative [Line Items] |  |  |  |
Number of derivative instruments | derivative |  |  | 2 |
Borrowings |  |  | $ 30,930,000 |
Interest rate swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Number of derivative instruments | derivative | 3 |  |  |
Interest rate swaps | Designated as hedging: |  |  |  |
Derivative [Line Items] |  |  |  |
Notional Amount |  |  | 30,000,000 | 30,000,000
Interest rate swaps | Subordinated debt |  |  |  |
Derivative [Line Items] |  |  |  |
Notional Amount |  |  | 30,000,000 |
Fair value of contract liability balances of interest rate swaps |  |  | $ 1,909,000 | 515,000
Interest rate swaps three years |  |  |  |
Derivative [Line Items] |  |  |  |
Notional Amount | $ 30,000,000 |  |  |
Derivative notional amount maturity period | 3 years |  |  |
Interest rate swaps four years |  |  |  |
Derivative [Line Items] |  |  |  |
Notional Amount | $ 35,000,000 |  |  |
Derivative notional amount maturity period | 4 years |  |  |
Interest rate swaps five years |  |  |  |
Derivative [Line Items] |  |  |  |
Notional Amount | $ 35,000,000 |  |  |
Derivative notional amount maturity period | 5 years |  |  |
Gain on canceled derivatives |  | $ 1,564,000 |  |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent |  |  |  |
Derivative [Line Items] |  |  |  |
Stockholders' equity |  |  |  | $ 955,000
London Interbank Offered Rate (LIBOR) | Interest rate swaps | Subordinated debt |  |  |  |
Derivative [Line Items] |  |  |  |
Variable interest rate |  |  | 2.08% |

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959 + Details
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- Definition Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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